Gold-filtering machine.



PATENTED AUG. 11, 1908.

y T. THoRDsoN. GOLD PILTBRING MACHINE.

APLIOATION FILED NOV. 1

Thorsin T? ords'on/ Witwen@ TIIORSTEIN TIIORDSON, OF OAKLAND, CALIFORNIA.l

GOLD-FILTERING MACHINE.

Specification of Letters Patent.

Application led November 1, 1907. Serial No. 400,293.

Patented Aug. 11, 1908.

To all whom it may concern:

Be it known that I, THoRsrErN THORD- sON, a citizen of the United States, residinfT at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Gold-Filtering Machines; and I do declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accom anying drawings, and to the characters o reference marked thereon, which form a part of this application.

This invention relates to improvements in gold finding devices and particularly to filtering machines, my object beingto produce such a device for use by prospectors or other persons, for filtering gold from sand or other material without the necessity of washing the same, which of course is a great advantage, as water is not always convenient for use. This object I accomplish by means of a pan provided with an agitating means, said pan being provided in its bottom with a plurality of pockets or cups for catching the gold; also by such other and further construction as will appear by a perusal of the following specifications and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views.

Figure 1-is a cross section of the complete device. Fig. 2 is a top plan view of a pan showing an agitating means by dotted lines.

Fig. 3 is a sectional view of an air blast pipe.

Fig. 4 is a bottom plan view of an agitating means. v Fig. 5 is a fragmentary view of an air tube.

Referring more particularly to the characters of references on the drawings 1 designates the pan proper disposed in the bottom of which are a plurality of pockets or cups 2. Secured inthe center of the pan 1 is a hollow pipe 3 provided at its upper end with a cap 4. Disposed in said pipe 3 in a higher plane than the top plane of the pan 1 are a plurality of orifices 5 inclined downward toward said pan. To the lower end of said tube 3 is secured a hose 6. Turnably mounted on said pipe 3 is an agitating mechanism constructed as follows A spindle 7 is held in position on said pipe by means of collars 8 and 9, the position of which are regulated by means of set screws 10 and 11 respectively. Outward from said spindle 7 are three arms 12 spaced apart as shown and provided with triangular shaped agitating teeth 13 depending to a point a slight distance above thebottom and sides of said pan, one corner edge of all of said teeth being disposed toward the forward line of travel of said teeth.

14 is an actuating handle suitably secured to one of said arms 12.

In using the device any suitable air blast means may be connected to the pipe 6. The sand or other material is then placed in the pan 1 and the agitating mechanism is then rotated in a rapid manner by means of the handle 14. This action works the heavier gold to the bottom and into the pockets 2, while the lighter sand on top is blown out of the pan 1 by means of the air blast in the hose 6 and pipe 3 being forced out through the orifices 5. Also if desired the blast could be forced onto the sand through a manually operated hose 15 having a perforated cap 16 as shown. Or if neither of these were at hand the operator can use his own breath for the purpose.

In practice the teeth 13 on each of arms 12 are spaced at different distances from the.

spind e 7 to keep a hole from forming in the sand at such point and preventing perfect agitation.

From the foregoing description it will be seen that I have produced a device which substantially fulfils all the objects of the invention as set forth herein.

I/Vhile this specification sets forth in detail the present and preferred embodiment of my invention, still in practice many small devia! tions therefrom may be resorted to without de arting from the spirit of the invention.

aving thus described my invention what l claim as new and desire to secure by Letters Patent is A means for effecting a dry concentration of ores comprising the combination of a pan dle disposed on one of said arms and spaced having a plurality of pockets in its bottom, a from said spindle, as set forth. Y l0 centrally disposed tube in said pan, a cap on ln testimony lwhereof I aHX my signature the upper end ofsaid tube, said tube having in presence of two Witnesses.

5 air outlets directed toward said pan, a spin- THORSTEIN THORDSON.

dle slidably adjustable vertically on said Witnesses: tube, arms on said spindle7 a plurality of agi- J osHUA B. WEBSTER,

tating teeth disposed on said arms, and a han- PERCY S. WEBSTER. 

